Double-Layer Anti-Splitting Slider Fastener

ABSTRACT

The present utility model discloses a double-layer anti-splitting slide fastener, comprising a left fastener tape, a right fastener tape, a left internal fastener element row and a left external fastener element row which are separately woven on surfaces inside and outside the left fastener tape by virtue of a left sewing thread, a right internal fastener element row and a right external fastener element row which are separately woven on surfaces inside and outside the right fastener tape by virtue of a right sewing thread, and a slider, wherein the left external fastener element row is locked to the right external fastener element row and the left internal fastener element row is locked to the right internal fastener element row; and, each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads, and each of the ground threads forms a hitch in coordination with at least one of the surface threads to form a chain stitch of the same number as the ground threads. In the present utility model, as each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads and chain stitches of the same number as the ground threads are formed, the fastener element rows may be secured at multiple points and the slide fastener is effectively prevented from splitting off.

TECHNICAL FIELD

The present utility model relates the technical field of slide fasteners, in particular to a double-layer anti-splitting slider fastener.

BACKGROUND OF THE PRESENT UTILITY MODEL

As one of quick locking mechanisms, slide fasteners have been widely applied in clothes, luggage and other products.

A slide fastener mainly includes a left fastener tape, a right fastener tape and a slider. The left and right fastener tapes are correspondingly locked to or unlocked from each other in the aid of the slider. The left or right fastener tape is symmetrically structured, each including a fastener tape and a fastener element row woven on the fastener tape by a sewing thread. The sewing thread of an existing slide fastener consists of one ground thread and two surface threads coordinated with each other. A plurality of continuous collars formed by the ground thread hitch the corresponding surface threads to form hitches to further form a stitched structure with chain stitches.

As there are only two surface threads for a sewing thread, its effect of securing the fastener element rows is very limited. When the slide fastener is opened and closed repeatedly or extruded by an external force, it tends to result in the mismatching of fastener elements and thus the split-off of the slide fastener. Consequently, the loss or theft of personal belongings in the language may be caused.

SUMMARY OF THE PRESENT UTILITY MODEL

A technical problem to be solved by the present utility model is to provide a double-layer anti-splitting slide fastener with better anti-splitting performance.

To solve the technical problem as described above, the present utility model employs the following technical solution: a double-layer anti-splitting slide fastener is provided, including a left fastener tape, a right fastener tape, a left internal fastener element row and a left external fastener element row which are separately woven on surfaces inside and outside the left fastener tape by virtue of a left sewing thread, a right internal fastener element row and a right external fastener element row which are separately woven on surfaces inside and outside the right fastener tape by virtue of a right sewing thread, and a slider, wherein the left external fastener element row is locked to the right external fastener element row and the left internal fastener element row is locked to the right internal fastener element row; and, each of the left sewing thread and the right sewing thread includes at least two ground threads and at least two surface threads, each of the ground threads forming a hitch in coordination with at least one of the surface threads to form chain stitches of the same number as the ground threads.

Further, each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row has a plurality of continuously connected fastener elements, and the top surface of each of the fastener elements is further provided with at least one notch for accommodating and limiting the sewing thread.

Further, each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch.

Further, each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch.

Further, each of the left sewing thread and the right sewing thread comprises two groups of sewing threads, wherein the first group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch, while the second group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch.

Further, each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row is a spiral fastener element row made from resin.

On the other hand, the present utility model further provides an anti-splitting slide fastener, including a left fastener tape and a right fastener tape which may be locked to one other, and a slider for bringing the left fastener tape and the right fastener tape to lock to or unlock from each other. Each of the left fastener tape and the right fastener tape is one as described above.

The present utility model has the following advantages: as each of the left sewing thread and the right sewing thread includes at least two ground threads and at least two surface threads and chain stitches of the same number as the ground threads are formed, the fastener element rows may be secured at multiple points so that the fastener element rows are better secured and the slide fastener may be effectively prevent from splitting off. Moreover, by arranging corresponding notches on the fastener element rows for accommodating and limiting the sewing threads, the fastener elements are less likely to move relative to the sewing threads, so that a better securing effect may be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall structure diagram of a double-layer anti-splitting slide fastener according to the present utility model;

FIG. 2 is a partially enlarged view of the double-layer anti-splitting slide fastener according to the present utility model;

FIG. 3 is a cross-sectional structure diagram of the double-layer anti-splitting slide fastener according to the present utility model;

FIG. 4 is a schematic diagram of assembling a left fastener tape with a left internal fastener element row and a left external fastener tooth row on surfaces inside and outside the left fastener tape, according to one embodiment of the double-layer anti-splitting slide fastener of the present utility model; and

FIG. 5 is a schematic diagram of assembling a left fastener tape with a left internal fastener element row and a left external fastener element row on surfaces inside and outside the left fastener tape, according to another embodiment of the double-layer anti-splitting slide fastener of the present utility model.

DETAILED DESCRIPTION OF THE PRESENT UTILITY MODEL

To explain the present utility model more clearly, the present utility model will be further described as below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3, the present utility model provides a double-layer anti-splitting slide fastener, including a left fastener tape 1, a right fastener tape 2, a left internal fastener element row 4 and a left external fastener element row 5 which are separately woven on surfaces inside and outside the left fastener tape 1 by virtue of a left sewing thread 3, a right internal fastener element row 7 and a right external fastener element row 8 which are separately woven on surfaces inside and outside the right fastener tape 2 by virtue of a right sewing thread 6, and a slider 9.

The left external fastener element row 5 is locked to the right external fastener element row 8 and the left internal fastener element row 4 is locked to the right internal fastener element row 7. Specifically, locking or unlocking is realized by the slider 9.

As shown in FIG. 3 to FIG. 5, the left internal fastener element row 4 and the left external fastener element row 5 are separately disposed on right edges of surfaces inside and outside the left fastener tape 1, and then woven on the left fastener tape 1 by virtue of the left sewing thread 3 to form a left fastener chain. The left sewing thread 3 includes at least two ground threads 30 and at least two surface threads 32. Each of the ground threads 30 forms a hitch in coordination with at least one of the surface threads 32 to form chain stitches of the same number as the ground threads 30.

To achieve a better positioning effect, the top surface of each fastener element of the left internal fastener element row 4 and the left external fastener element row 5 may be further provided with a notch 40, 50 for accommodating and limiting the sewing thread. The notches on the left internal fastener element row 4 are used for accommodating and limiting the ground threads 30, while the notches 50 on the left external fastener element row 5 are used for accommodating and limiting the surface threads 32. Each of the notches 40, 50 may be a large notch (as shown in FIG. 3). Alternatively, a notch may be provided for each of the ground threads 30 or surface threads 32 for accommodating the corresponding sewing thread (as shown in FIG. 4 and FIG. 5).

The arrangement of the left sewing thread 3 in the present utility model may be implemented in many different modes.

Mode 1: The left sewing thread 3 is woven in such a way that each of the ground threads 30 correspondingly hitches two surface threads 32 to form a chain stitch, as shown in FIG. 3.

Mode 2: The left sewing thread 3 is woven in such a way that each of the ground threads 30 correspondingly hitches one of the surface threads 32 to form a chain stitch, as shown in FIG. 4.

Mode 3: a combination of the above two modes: the first group of left sewing threads 3 are woven in such a way that each of the ground threads 30 correspondingly hitches one of the surface threads 32 to form a chain stitch, while the second group of left sewing threads 3 are woven in such a way that each of the ground threads 30 correspondingly hitches two surface threads 32 to form a chain stitch, as shown in FIG. 5.

It may be understood that there may be more left sewing threads 3. For example, there may be three, four, eight or more ground threads and surface threads.

The right internal fastener element row 7 and the right external fastener element row 8 are separately woven on left edges of surfaces inside and outside the right fastener tape 2 by virtue of the right sewing thread 6 to form a right fastener chain. Similarly, the right sewing thread 6 includes ground threads 60 and surface threads 62. The right fastener chain is arranged symmetrically to the left fastener chain and has a structure principle fundamentally the same as that of the left fastener chain, and the right fastener chain thus will not be repeated here.

In the present utility model, as each of the left sewing thread 3 and the right sewing thread 6 includes at least two ground threads 30 and at least two surface threads 32 and chain stitches of the same number of the ground threads are formed, the fastener element rows may be secured at multiple points so that the fastener element rows are better secured and the slide fastener may be effectively prevent from splitting off. Moreover, by arranging corresponding notches on the fastener element rows for accommodating and limiting the sewing threads, the fastener elements in the fastener element rows are less likely to move relative to the sewing threads, so that a better securing effect may be achieved.

The above disclosure merely shows several specific embodiments of the present utility model, and the present utility model is not limited thereto. Any variations that may come into the mind of those skilled in the art shall fall into the protection scope of the present utility model. 

1. A double-layer anti-splitting slide fastener, comprising a left fastener tape, a right fastener tape, a left internal fastener element row and a left external fastener element row which are separately woven on surfaces inside and outside the left fastener tape by virtue of a left sewing thread, a right internal fastener element row and a right external fastener element row which are separately woven on surfaces inside and outside the right fastener tape by virtue of a right sewing thread, and a slider, wherein the left external fastener element row is locked to the right external fastener element row and the left internal fastener element row is locked to the right internal fastener element row, characterized in that each of the left sewing thread and the right sewing thread comprises at least two ground threads and at least two surface threads, each of the ground threads forming a hitch in coordination with at least one of the surface threads to form chain stitches of the same number as the ground threads.
 2. The double-layer anti-splitting slide fastener according to claim 1, characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row has a plurality of continuously connected fastener elements, and the top surface of each of the fastener elements is further provided with at least one notch for accommodating and limiting the sewing thread.
 3. The double-layer anti-splitting slide fastener according to claim 1, characterized in that each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch.
 4. The double-layer anti-splitting slide fastener according to claim 1, characterized in that each of the left sewing thread and the right sewing thread is woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch.
 5. The double-layer anti-splitting slide fastener according to claim 1, characterized in that each of the left sewing thread and the right sewing thread comprises two groups of sewing threads, wherein the first group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches one of the surface threads to form a chain stitch, while the second group of sewing threads are woven in such a way that each of the ground threads correspondingly hitches two surface threads to form a chain stitch.
 6. (canceled)
 7. The double-layer anti-splitting slide fastener according to claim 1, characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row is a spiral fastener element row made from resin.
 8. The double-layer anti-splitting slide fastener according to claim 2, characterized in that each of the left internal fastener element row, the left external fastener element row, the right internal fastener element row and the right external fastener element row is a spiral fastener element row made from resin. 